accept either key file path or file itself

Author: vvkh

data_diff/databases/snowflake.py

@@ -1,4 +1,5 @@
-from typing import Any, Union, List
+import base64
+from typing import Any, Union, List, Optional
 import logging
 
 import attrs
@@ -162,7 +163,7 @@ class Snowflake(Database):
 
     _conn: Any
 
-    def __init__(self, *, schema: str, **kw):
+    def __init__(self, *, schema: str, key: Optional[str] = None, key_content: Optional[str] = None, **kw):
         super().__init__()
         snowflake, serialization, default_backend = import_snowflake()
         logging.getLogger("snowflake.connector").setLevel(logging.WARNING)
@@ -172,20 +173,29 @@ def __init__(self, *, schema: str, **kw):
         logging.getLogger("snowflake.connector.network").disabled = True
 
         assert '"' not in schema, "Schema name should not contain quotes!"
+        if key_content and key:
+            raise ConnectError("Only key value or key file path can be specified, not both")
+
+        key_bytes = None
+        if key:
+            with open(key, "rb") as f:
+                key_bytes = f.read()
+        if key_content:
+            key_bytes = base64.b64decode(key_content)
+
         # If a private key is used, read it from the specified path and pass it as "private_key" to the connector.
-        if "key" in kw:
-            with open(kw.get("key"), "rb") as key:
-                if "password" in kw:
-                    raise ConnectError("Cannot use password and key at the same time")
-                if kw.get("private_key_passphrase"):
-                    encoded_passphrase = kw.get("private_key_passphrase").encode()
-                else:
-                    encoded_passphrase = None
-                p_key = serialization.load_pem_private_key(
-                    key.read(),
-                    password=encoded_passphrase,
-                    backend=default_backend(),
-                )
+        if key_bytes:
+            if "password" in kw:
+                raise ConnectError("Cannot use password and key at the same time")
+            if kw.get("private_key_passphrase"):
+                encoded_passphrase = kw.get("private_key_passphrase").encode()
+            else:
+                encoded_passphrase = None
+            p_key = serialization.load_pem_private_key(
+                key_bytes,
+                password=encoded_passphrase,
+                backend=default_backend(),
+            )
 
             kw["private_key"] = p_key.private_bytes(
                 encoding=serialization.Encoding.DER,